Improvement in tin-grooving machines



N UNITE ST-Arne ParanaA @Frio-E.

' Honnrio J. NoYns, or AsnTABuLA, onio.

Y j IMPROVEMENTIN TIN-GRQOVING MACHINES.

y Specification forming part of Letters'Patent No. 115,348, dated May 30, 1871.

` 1 l To all 'whom 'it 'may` concern@ g Beitknown'that I, HoRA'rIoJ. Noms, of Ashtabula, in they county of Ashtabula and n' State of Ohio, have invented a certain new and Improved TinGrooving Machine, of which f the following is adescription, reference being had to theaccompanyin g drawin ginakin g part of this specification.

. Fig. 2 is a plan View. Figs. 3 and 4. are views of the frontend. l Like letters of referencerefer to like parts yinthe different views. y i The nature of thisinvention relates to a max y chine forfrolling and formingthe seamsin sheet nietal.` Said machine consists of a grooved roller and a plain one, secured in a movable f head, actuated by arack and pinion, whereby l.said rollers are made to traverse a smooth plain rail on which the work is laid for being y pressedby the rollers. The object of this yinvention is to facilitate `the work of seaming `l1 sheet`metal,and to produce a smoother and y more perfect joint than canbe made in the ordinary way,ashereinaftermoreilly described. In the drawing, Fig. 1, A represents a bar, which is secured to the bench B so that it will l d l project beyond the edge of thebeneh, as shown in Fig. 2. .The upper edge ofthe bar is a smooth plain surface, as shown at a, Fig. 3, and upon whiehthe seaming-rollers run for pressing the `T` seam.` GD arethe rollers referred to, and y which are pivoted in the cheeks of the lower l y l part of thehead E, as shown in Fig. 1. The y lrfront roller, or roller G, is provided with a y groove, b, Fig. 4, which is `of the size and i `shape of the laps of the joint or'seam, and 1 l upon which it runs, as will hereinafter be shown. The roller Dirnmediately in the rear y f1 of the grooved one has a smooth dat face, and l which also runs upon the surface of the bar Ij and upon the work when laidthereon. F, fj] j Fig. 1, is an arm projecting from the bench in 1 l fthe same direction asthe bar and immediate- 3 -ly above it, and connected therewith by the elbow G at the rear end and to the front end i l bythe link H. In the side of said arln is i formed a rack, I,in which works the pinionJ pivoted in the upper part of the head E, and 1 whereby said head is `moved backward and l forward along the arm by the crank K actuat- .1 ing the pinion. L L is a pair of friction-rollersy Figure 1 is asidefelevation of the machine.

the arm,

pivoted in the ends of a link, M, and whereby rthey are connected to each other. Said link passes between the cheeks of rthe head E, thereby bringing the rollers directly above the rollers GD and immediately under the 'edge' of the arm, and upon which they roll while the -head is being worked, orrollers thereof, upon the seam.

The practical working of this machine is as follows: Sheets of metal, or, for illustration a sheet of metal of which a length of stove pipe is to be made, is first prepared by having up for forming a lock-joint f the edges turned or seam, which, on being locked into each other in the usual way, is then laid on the bar.

A, the head Eat this time being stationed at the inner end, near the elbow Gr. The position ofthe seam is such as to lie along upon the edge of the bar A, as indicated by the dotted lines c, Fig. 3. The operator now, bymeans of the crank K, pinion, Ste., forces the rollers G D along upon the seam. The groove in the roller C being aboutV the width of the lap of the joint runs along over it, the thickness of the lap. passing in the groove, whereas theV edges or surfaces on each side of the groove press the metal on the upper side of the lap down even with that on the under side of the lap, thus making the sheet forming the upper or outside of the lap iiush with that forming the inside of the seam. This being done the grooved roller is followed by the hat smooth roller D, which fiattens down the seam, making a smooth, flat, tight joint. Should the pressure of the rollers be too Weak or great to effectually compress the lap upon each other, as more or less force is required, according to the thickness of the metal, a proportionate pressure is obtained by the wedge N, Fig. 3, which, on being 'adjusted' by the spring and thumbscrew O P, forces the slide or link M upward or downward, thereby bringing the friction-rollers L with more or less force against er upon the bar, and therefore roll with more or less force upon the seam that may be placed upon it.` When the pressure is. great, in coni sequence of using a thick sheet of metal, the arm and bar are prevented from being forced apart from each other in the exertion of such pressure by means of the link H, whereby the Y which, as a consequence, will cause the rollers C D to press correspondingly hard-` extreme ends are linked together, and thereby prevent their spreading. The link being pivoted to the end of the bar, can be turned down, as indicated by the dotted lines e, Fig. 1.

This machine has the advantage of having the actuating power, the pinion, crank, and head moving along together with the rollers,

so that the operator has not to reach his hand l. The combination of the arm F, having on its side a ratchet, I, bar A, and pinion J, substantially in the manner as described, and for the purpose set forth.

`2. The grooved roller C and roller D, friction-rollers L, pinion J, vand head E, all arranged to operate in combination with the arm F and bar A, substantially in the manner as and for the purpose specified.

3. The Wedge N, as arranged to operate in combination with the link or slide M for adjusting the rollers L, as and for the purpose set fort-h.

HORATIO J. NOYES.

Witnesses:

W. H. BURRIDGE, D. L. HUMPHREY. 

